Concrete-reinforcement



M. J. WALL.

CONCRETE REINFORCEMENT. APPLICATION FILED JUNE 22, 1-916.

Patented J 11116 7, 1921.

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- APPLICATION FILED JUNE 22, I9I6- Patented June 7, 1921.

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MICHAEL J. WALL, 01? TROY, NEW YORK.

CONCRETE-REINFORCEMENT.

Specification of Letters Patent.

Patented June *7, 1921.

Application filed June 22, 1916. Serial No. 105,179.

To (ZZZ to 7mm it may concern:

Be it known that 1, MICHAEL J. WALL, a citizen of the United States, and resident of Troy, in the county of Rensselaer and State of New York, have invented certain new and useful Improvements in Concrete-Reinforcements, of which the following is a specification.

The present invention relates to masonry and concrete structures and has particular reference to new and useful improvements in reinforcing devices for association with concrete, cement and other structural materials.

The primary object of my invention is to provide an improved and novel form of reinforcing element for use in connection with masonry and concrete structures, the reinforcing element being constructed of expansible material whereby the same may be adjusted to different thicknesses and heights of concrete walls and the like, the reinforcing element proper being embedded in the concrete or cement as the case may be.

Another object of my invention is to provide a reinforcing element of the class described which is capable of universal application to various types of concrete construction, said reinforcing element being struck from metal rods or the like and adapted to be expanded for use in the concrete.

A further object of my invention is to provide a reinforcing element which obviates the necessity of anchor rods, .stirrups, and other complicated and inefficient reinforcing devices.

Other objects and advantages to be'derived from the use of my improved reinforcing element will appear from the following detail description and the claims, taken with an inspection of the accompanying drawings, in which:

Figure 1 is a fragmental side elevational view of one form of reinforcing element showing the same prior to expansion;

Fig. 2 is a similar view of the'same reinforcing element showing the same ex- Fig. 6 is a similar view of a still further appllcation of the device; and

F g. 7 is an enlarged fragmental sectional view of a still further application of the device. Referring more particularly to the drawings, wherein similar characters of reference designate like and corresponding parts throughout the various views, my improved reinforcing element is preferably formed from a bar 1 of metal provided with an enlarged base portion 2 and a head 3. Of course, the base portion and the head are in the form'of beads and extend throughout the length of the bar. The bar is provided with a plurality of slits 4 having offset portlons 5, the central portion of the bead 3 belng severed as at 6 and provided with a relatively long incision or slit 7. The incisions 4 terminate near the offset portions of the adjacent incision whereby when the metal is expanded the base portion 2 and the head 3 are connected by diagonally extending brace rods 8 and 9, the bars 8 and 9 being relatively oppositely disposed, owing to the incisions 6 and 7 at the central portion of the bar 1. Referring specifically to Fig. 2 it will be seen that the free ends of the head 3, where the same is out are in overlapping relation as designated at 10, said ends being welded or otherwise permanently at ,tched. Of course, this permanent connection is only made after the metal has been expanded to the desired height.

' Referring to the modified form of my invention shown in Figs. 3 and 4, I provide a bar 11 having an enlarged base portion 12 and a head 13. The head 13 is provided with a plurality of incisions 14 and 15, relatively oppositely disposed, whereby when the metal is expanded a plurality of oppositely disposed diagonally extending rods 16 and 17 are formed. The outer free end portions of the rods 16 and 17 are bent into parallel relation with the base 12 as indicated at 18 and 19.

One use of my invention is best shown in Fig. 5, wherein the walls of a building have been shown and designated 20 and 21, said walls being connected by the floor 22. The fioor is provided with longitudinally extending concrete beams 23, intermediate transverse beams 24 being formed integrally therewith. The reinforcing device of my inventionis arranged in each of the beams 23 and is designated 25, said reinforcing element extending longitudinally of the beam and serving to support transversely extending reinforcing elements 26 embodying the improvements of my invention, the elements 26 being arranged in the transverse beam 2i, only one of which is shown.

Referring to Fig. 6 the floor has been designated 27 and is carried in the side walls 28 and 29. A plurality of longitudinally extendino' beams 30 are reinforced by the ele- 'ment 31, so oesignated, said element embodying the improvements ofmy invent on, that is, the preferred form of the invention. it will be noted that the upper portion of the reinforcing element 31 serves to support and form a perfect guide for the steel rods 32.

Referring to Fig. 7 the floor is designated 33, longitudinal beam is designated 34 and a transverse beam 35. The reinforcing element is designated 36 and serves to support as at 38 the transversely extendihgreinforcing element 39 embodying the 1mprovements of the modified form of my invention illustrated in Figs. 3 and l.

From the foregoing it will be seen that various arrangements of the reinforcing element of invention are possible without departing from the spirit and scope of the invention. Of course, while I have shown several applications of the device it is to be understood that I do not limit myself to these applications but desire to reserve the right to apply the reinforcing element to different arrangements. A plurality of the reinforcing elements designated 25, 31 and 36 may be provided in each of their respective beams, or the same may be associated with an ordinary eye beam.

If a greater height is desired the incisions may be increased in length permitting the provision of longer rods. I desire to lay particular stress upon the construction of the bar in one unit, that is, as a single element, it impossible to lose any essenpart "of the element which might render thesame useless. T he provision of the head extending longitudinally ofthe preferred.

form of my invention as shown in Figs. 1 and 2 serves, when used in a concrete beam, to remove some of the strain from the lower portion of the beam, that is, the strain is distributed over the beam instead of being conrzentrated at the lower portion thereof. The reinforcing device of my invention may be as readily applied in connection with wire mesh reinforcingdevices as with the ordinary steel rod.

Upon an inspection of Flgs, l to l 1t will be noted that aplurality of shoulders designated S in each case are provided, said shoulders formin abutments a ainst which.

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the concrete, when poured, may engage, this being another advantageous feature of my improved reinforcing element. This arrangement causes allof the diagonally extending rods in both forms of my invention to coact and distribiite the pressure.

lt will also be noted that the reinforcing unit of my invention forms a truss permitting the same to carry more weight than the detachably associated reinforcing devices heretofore offered. The reinforcing form may be used in connection with the steel cap system, and in this event the metal lath is placed upon a form and wired to the reinforcing bar of my invention, this being done before concrete is poured in position.

Another feature of my invention upon which I desire to lay stress is that in the arrangement of the brace rods 8, 9, 16 and 17 diagonally the twisting or expansion and contraction of a concrete beam is accommodated without danger of the reinforcing element buckling and cracking the concrete. If desired the free ends of the bead 3 of the preferred form of my invention need not be welded as indicated at 10 and referred to 'hereinbefore, as in this manner great changesin temperature are provided for, the overlapping ends permitting relatively large movement owing to expansion and contraction.

From the above description taken in connection with the accompanying. drawings, it is thought that a clear and comprehensive understanding of the construction, operation and advantages of my invention may be had, and while 1 have shown and described I the device as embodying a specific structure, I desire that it be understood that such changes may be made in said structure as do not depart from the spirit and scope of the invention as claimed.

Having thus fully described my invention, what I claim as new and desire to secure by Letters Patent, is

A reinforcing element for plastic 'structures comprising a bar having an enlarged ase portion and a reduced upper portion, longitudinally disposed ribs on opposite sides of the bar, said reduced portion of the bar being provided with spaced rows of longitudinally alined incisions extending in both directions from the central point thereof and arranged in relatively staggered positions to form overlapping sections when the reduced portion of the bar is expanded in a single, vertical plane in the direction of the depth of thebar, said overlapping sections being permanently attached to each other to present a continuous, horizontal, top edge, said edge having a right angular transverse slit, the terminals constituted-by the slit overlapping and of the same width when the reduced portion of the bar is vertically expanded. V g In testimony whereof, I aiiix my signature hereto.

MICHAEL J. WALL; 

